Добавление пути изображений в базу данных

require_once("/includes/global.php"); // подключение к БД, PDO
require_once("upload.php");
// куски кода
$add_topic_query = "INSERT INTO topics (title, user_id, views, sticky, global_sticky, price, text, date) VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
            $add_topic_res = $pdo->prepare($add_topic_query);
            $add_topic = $add_topic_res->execute(array($title, $user_id, $views, $sticky, $global_sticky, $price, $text, $now));
// .. Остальное
<form action="#" class="dropzone"></form>
// футер и тд

$ds = DIRECTORY_SEPARATOR;  //1
    $storeFolder = 'uploads/topics';   //2
    $allowed = array('png', 'jpg', 'gif', 'jpeg');
    $max_size = 1024 * 3 * 1024;
    if (!empty($_FILES)) {
        $extension = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);
        $tempFile = $_FILES['file']['tmp_name'];          //3
 
        $targetPath = dirname(__FILE__) . $ds . $storeFolder . $ds;  //4
        $now = time();
        $start = array('image/png', 'image/jpeg', 'image/gif', 'image/pjpeg');
        $result = array('.png', '.jpg', '.gif', '.jpg');
        $test = str_replace($start, $result, $_FILES['file']['type']);
        $targetFile = $targetPath . $now . $test;
        $url_for_db = $now . $test;
 
        if (in_array($extension, $allowed) AND $_FILES["filename"]["size"] < $max_size) {
            if (empty($_SESSION['LoggedIn']) && empty($_SESSION['user_id'])) {
            move_uploaded_file($tempFile, $targetFile); //6
            $add_topic_picture = "INSERT INTO topic_pictures (date, url) VALUES (?, ?)";
            $add_topic_picture_res = $pdo->prepare($add_topic_picture);
            $add_topic_picture = $add_topic_picture_res->execute(array($now, $url_for_db));
                return $url_for_db;
        } else echo 'Error';
    }
    }

topic_id = 123,
url = 123.jpg
topic_id = 123,
url = test.jpg
topic_id = 123,
url = screen.jpg